chore: import upstream snapshot with attribution

plugin/common/serialize.hpp

@@ -0,0 +1,171 @@
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 1993-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#pragma once
+
+#include <cstring>
+#include <stdexcept>
+#include <type_traits>
+#include <vector>
+
+#include <iostream>
+using std::cerr;
+using std::cout;
+using std::endl;
+
+template <typename T>
+inline void serialize_value(void** buffer, T const& value);
+
+template <typename T>
+inline void deserialize_value(void const** buffer, size_t* buffer_size, T* value);
+
+namespace
+{
+
+template <typename T, class Enable = void>
+struct Serializer
+{
+};
+
+template <typename T>
+struct Serializer<T, std::enable_if_t<std::is_arithmetic_v<T> || std::is_enum_v<T> || std::is_pod_v<T>>>
+{
+    static size_t serialized_size(T const&)
+    {
+        return sizeof(T);
+    }
+    static void serialize(void** buffer, T const& value)
+    {
+        ::memcpy(*buffer, &value, sizeof(T));
+        reinterpret_cast<char*&>(*buffer) += sizeof(T);
+    }
+    static void deserialize(void const** buffer, size_t* buffer_size, T* value)
+    {
+        if (*buffer_size < sizeof(T))
+        {
+            throw std::runtime_error("Deserialization error: buffer too small for scalar value");
+        }
+        ::memcpy(value, *buffer, sizeof(T));
+        reinterpret_cast<char const*&>(*buffer) += sizeof(T);
+        *buffer_size -= sizeof(T);
+    }
+};
+
+template <>
+struct Serializer<const char*>
+{
+    static size_t serialized_size(const char* value)
+    {
+        return strlen(value) + 1;
+    }
+    static void serialize(void** buffer, const char* value)
+    {
+        ::strcpy(static_cast<char*>(*buffer), value);
+        reinterpret_cast<char*&>(*buffer) += strlen(value) + 1;
+    }
+    static void deserialize(void const** buffer, size_t* buffer_size, char const** value)
+    {
+        *value = static_cast<char const*>(*buffer);
+        size_t const data_size = strnlen(*value, *buffer_size) + 1;
+        if (*buffer_size < data_size)
+        {
+            throw std::runtime_error("Deserialization error: buffer too small for C string");
+        }
+        reinterpret_cast<char const*&>(*buffer) += data_size;
+        *buffer_size -= data_size;
+    }
+};
+
+template <typename T>
+struct Serializer<std::vector<T>, std::enable_if_t<std::is_arithmetic_v<T> || std::is_enum_v<T> || std::is_pod_v<T>>>
+{
+    static size_t serialized_size(std::vector<T> const& value)
+    {
+        return sizeof(value.size()) + value.size() * sizeof(T);
+    }
+    static void serialize(void** buffer, std::vector<T> const& value)
+    {
+        serialize_value(buffer, value.size());
+        size_t nbyte = value.size() * sizeof(T);
+        ::memcpy(*buffer, value.data(), nbyte);
+        reinterpret_cast<char*&>(*buffer) += nbyte;
+    }
+    static void deserialize(void const** buffer, size_t* buffer_size, std::vector<T>* value)
+    {
+        size_t size;
+        deserialize_value(buffer, buffer_size, &size);
+        // Single division-based check covers both integer overflow (size*sizeof(T) wraps)
+        // and out-of-bounds memcpy, and must happen before resize() to prevent DoS.
+        if (size > *buffer_size / sizeof(T))
+        {
+            throw std::runtime_error("Deserialization error: vector size exceeds available buffer");
+        }
+        size_t const nbyte = size * sizeof(T);
+        value->resize(size);
+        ::memcpy(value->data(), *buffer, nbyte);
+        reinterpret_cast<char const*&>(*buffer) += nbyte;
+        *buffer_size -= nbyte;
+    }
+};
+
+template <>
+struct Serializer<std::string>
+{
+    static size_t serialized_size(std::string const& value)
+    {
+        return sizeof(value.size()) + value.size();
+    }
+    static void serialize(void** buffer, std::string const& value)
+    {
+        size_t nbyte = value.size();
+        serialize_value(buffer, nbyte);
+        ::memcpy(*buffer, value.data(), nbyte);
+        reinterpret_cast<char*&>(*buffer) += nbyte;
+    }
+    static void deserialize(void const** buffer, size_t* buffer_size, std::string* value)
+    {
+        size_t nbyte;
+        deserialize_value(buffer, buffer_size, &nbyte);
+        if (nbyte > *buffer_size)
+        {
+            throw std::runtime_error("Deserialization error: string size exceeds available buffer");
+        }
+        value->resize(nbyte);
+        ::memcpy(const_cast<char*>(value->data()), *buffer, nbyte);
+        reinterpret_cast<char const*&>(*buffer) += nbyte;
+        *buffer_size -= nbyte;
+    }
+};
+
+} // namespace
+
+template <typename T>
+inline size_t serialized_size(T const& value)
+{
+    return Serializer<T>::serialized_size(value);
+}
+
+template <typename T>
+inline void serialize_value(void** buffer, T const& value)
+{
+    return Serializer<T>::serialize(buffer, value);
+}
+
+template <typename T>
+inline void deserialize_value(void const** buffer, size_t* buffer_size, T* value)
+{
+    return Serializer<T>::deserialize(buffer, buffer_size, value);
+}